Nasopharyngeal polymicrobial colonization during health, viral upper respiratory infection and upper respiratory bacterial infection

Department

Research

Document Type

Article

Publication Title

The Journal of Infection

Abstract

OBJECTIVES: We sought to understand how polymicrobial colonization varies during health, viral upper respiratory infection (URI) and acute upper respiratory bacterial infection to understand differences in infection-prone vs. non-prone patients. METHODS: Nasopharyngeal (NP) samples were collected from 74 acute otitis media (AOM) infection-prone and 754 non-prone children during 2094 healthy visits, 673 viral URI visits and 631 AOM visits. Three otopathogens Streptococcus pneumoniae (Spn), Nontypeable Haemophilus influenzae (NTHi), and Moraxella catarrhalis (Mcat) were identified by culture. RESULTS: NP colonization rates of multiple otopathogens during health were significantly lower than during viral URI, and during URI they were lower than at onset of upper respiratory bacterial infection in both AOM infection-prone and non-prone children. AOM infection-prone children had higher polymicrobial colonization rates than non-prone children during health, viral URI and AOM. Polymicrobial colonization rates of AOM infection-prone children during health were equivalent to that of non-prone children during viral URI, and during viral URI were equivalent to that of non-prone during AOM infection. Spn colonization was positively associated with NTHi and Mcat colonization during health, but negatively during AOM infection. CONCLUSION: The infection-prone patients more frequently have multiple potential bacterial pathogens in the NP than the non-prone patients. Polymicrobial interaction in the NP differs during health and at onset of infection.

First Page

26

Last Page

34

DOI

10.1016/j.jinf.2017.04.003

Volume

75

Issue

1

Publication Date

7-1-2017

Medical Subject Headings

Acute Disease (epidemiology); Bacteria (classification, isolation & purification); Bacterial Infections (epidemiology, immunology, microbiology); Child, Preschool; Coinfection (epidemiology, immunology, microbiology); Disease Susceptibility (epidemiology, microbiology); Female; Haemophilus influenzae (isolation & purification, physiology); Healthy Volunteers; Humans; Infant; Longitudinal Studies; Male; Moraxella catarrhalis (isolation & purification, physiology); Nasopharynx (microbiology); Otitis Media (microbiology); Prospective Studies; Respiratory Tract Infections (epidemiology, microbiology, virology); Streptococcus pneumoniae (isolation & purification, physiology)

PubMed ID

28412081

Link to Full Text

Share

COinS